#include <iostream>
using namespace std;

	int a;
	char c;
	float f;
	double d;

int main ()
{
//	int a;
//	char c;
//	float f;
//	double d;
	cout << "int:" << a << endl;
	cout << "char:" << c << endl;
	cout << "float:" << f << endl;
	cout << "double:" << d << endl;

	return 0;
 } 
